https://wiki.simtx.net/index.php?action=history&feed=atom&title=Transmitter_InterfaceTransmitter Interface - Revision history2026-07-29T07:29:48ZRevision history for this page on the wikiMediaWiki 1.43.9https://wiki.simtx.net/index.php?title=Transmitter_Interface&diff=4&oldid=prevClanker: Create interface reference2026-07-05T08:42:27Z<p>Create interface reference</p>
<p><b>New page</b></p><div>This page is a reference for the SimTX Transmitter application window. The window is split into a configuration form on the left and a live monitoring area on the right, with a status bar at the bottom.<br />
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== Server selector ==<br />
Shown at startup and after a disconnect. It lists known servers with their details and provides:<br />
* '''Add Server...''': name, host, port (1 to 65535, default 5100), optional description.<br />
* '''Connect''': establishes the control connection and opens the main window.<br />
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If the connection to the server drops while the application is running, the title area indicates that the client is reconnecting and retries every 3 seconds.<br />
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== Station section ==<br />
* '''Server''' row with a '''Disconnect''' button (returns to the server selector).<br />
* '''Callsign''': station identifier shown to the server and other users. Persisted between runs.<br />
* '''Location''': a clickable world map that fills the '''Lat''' and '''Lon''' fields. Coordinates can also be typed directly. Persisted between runs.<br />
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== RF Signal section ==<br />
* '''Frequency (Hz)''': carrier frequency. Default 4625000 (4625 kHz), chosen to match the default antenna, see [[Getting Started]].<br />
* '''Power (W)''': requested transmitter output power. Default 100.<br />
* '''Radio Preset''': selects a transmitter character, see [[Radio Presets]]. Selecting a preset overwrites the power field and all advanced settings.<br />
* '''Modulation''': the modulation mode, see [[Modulation Modes]].<br />
* '''Bandwidth (Hz)''' with an '''Auto''' checkbox. Auto fills the typical bandwidth of the selected mode. Default 2700.<br />
* '''Low-cut (Hz)''': audio low-frequency cutoff. Default 350. Editable only for modes where it applies.<br />
* '''Show advanced transmitter settings''': expands the fifteen fine-tuning fields, see [[Advanced Transmitter Settings]].<br />
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== Transmission Source section ==<br />
* '''Source Type''': see [[Transmission Sources]].<br />
* '''Audio Gain''': input level, default 0.9.<br />
* '''Microphone''': device selector, visible only for the Microphone source.<br />
* '''Tone (Hz)''': test tone frequency, default 1000. For the GNU Radio IQ source this field is relabelled '''IQ Port'''.<br />
* '''Audio File''' row with '''Choose...'''. Audio files can also be dragged onto the window (wav, mp3, aiff, aif, au).<br />
A hint line below the controls describes the currently selected source.<br />
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== Antenna section ==<br />
* '''Type''': antenna selector, default EFHW + 49:1 unun. See [[Antenna System]].<br />
* '''Wire Length (m)''': main dimension of the antenna. The label adapts to the type (Circumference for the loop, Element Length for the vertical, Driven Element for the Yagis). A value of 0 means resonant length at the operating frequency.<br />
* '''Height (m)''': feedpoint or apex height above ground. Default 10.<br />
* '''Azimuth (°)''': orientation, 0 is north. Disabled for the vertical, which is omnidirectional.<br />
* '''Feedline Loss (dB)''': fixed loss between transmitter and antenna.<br />
* '''Import NEC...''' and '''Use built-in''': load or clear a custom antenna geometry, see [[NEC File Import]].<br />
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== Start row ==<br />
* '''Start TX''': starts a transmission session with the current configuration.<br />
* '''Save Preset...''' and '''Load Preset...''': store or restore the complete station configuration as a <code>.stxpreset</code> file. This includes every field, the source selection and any imported NEC deck.<br />
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== Radio Deck ==<br />
The right-hand panel shows six meters:<br />
{| class="wikitable"<br />
! Meter !! Unit !! Meaning<br />
|-<br />
| FWD || W || Forward output power<br />
|-<br />
| REF || W || Reflected power returning from the antenna<br />
|-<br />
| SWR || :1 || Standing wave ratio at the transmitter<br />
|-<br />
| ALC || dB || Automatic level control action<br />
|-<br />
| TEMP || °C || Power amplifier finals temperature<br />
|-<br />
| BUF || s || Audio buffer fill<br />
|}<br />
Before the server reports measurements the deck shows a local estimate computed from the antenna configuration. Once telemetry arrives the header switches to measured output. If the amplifier overheats the header shows a PA OVERHEATED warning, see [[Power Amplifier Behaviour]].<br />
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== Active Sessions ==<br />
A list of the operator's sessions with id, callsign, frequency, modulation, power, status, source, SWR, bandwidth and server address. Buttons: '''Stop Selected''', '''Stop All''', '''Clear Finished'''. Session states are described in [[Sessions and Queueing]].<br />
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[[Category:SimTX]]</div>Clanker